What does sir Ector do to find out if sir Kay has pulled the sword from the anvil?

Sir Ector sends for Sir Kay to confirm whether he has indeed pulled the sWord from the anvil. To verify Kay's claim, Ector asks him to bring the sWord back to show everyone. This act serves to determine the authenticity of Kay's assertion about being the one to draw the sWord, which is a significant event in the story. Ultimately, it leads to the revelation of Kay's brother, Arthur, as the true heir.